If you're in Koh Samui want some delicious, authentic, cheap Thai food then you have to go to Kool & Nuch. I was there for 2 months and I ate at their restaurant over 20 times. I'm back in the California now but I still crave their food daily. Everything is fantastic but my favorite dishes are PHAD-SI-IEW and CHICKEN SUKIYAKI, and SPICY PAPAYA SALAD. The owners are very welcoming to everyone, they make you feel at home. Everything is fresh and made to order. My fondest memories of Koh Samui are definitely of Kool & Nuch's restaurant. Delicious food, relaxing atmosphere, very inexpensive, lovely regulars to chat with, and the most gracious hosts.